Packetyzer provides a Windows user interface for the well known Ethereal packet capture and dissection library. Ethereal is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the standard features expected in a protocol analyzer, and several features not otherwise available. Network Chemistry has taken advantage of its open source license to add a Windows front end to extend its use. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.